AU2015317033B2 - Supply method for palettizing devices in distribution centers - Google Patents

Supply method for palettizing devices in distribution centers Download PDF

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Publication number
AU2015317033B2
AU2015317033B2 AU2015317033A AU2015317033A AU2015317033B2 AU 2015317033 B2 AU2015317033 B2 AU 2015317033B2 AU 2015317033 A AU2015317033 A AU 2015317033A AU 2015317033 A AU2015317033 A AU 2015317033A AU 2015317033 B2 AU2015317033 B2 AU 2015317033B2
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goods
storage area
depalletising
pallets
buffer storage
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AU2015317033A1 (en
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Hans Christoph Meurer
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Dematic GmbH
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Dematic GmbH
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q10/00—Administration; Management
    • G06Q10/08—Logistics, e.g. warehousing, loading or distribution; Inventory or stock management
    • G06Q10/087—Inventory or stock management, e.g. order filling, procurement or balancing against orders
    • G06Q10/0875—Itemisation or classification of parts, supplies or services, e.g. bill of materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G1/00—Storing articles, individually or in orderly arrangement, in warehouses or magazines
    • B65G1/02—Storage devices
    • B65G1/04—Storage devices mechanical
    • B65G1/137—Storage devices mechanical with arrangements or automatic control means for selecting which articles are to be removed
    • B65G1/1373—Storage devices mechanical with arrangements or automatic control means for selecting which articles are to be removed for fulfilling orders in warehouses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G1/00—Storing articles, individually or in orderly arrangement, in warehouses or magazines
    • B65G1/02—Storage devices
    • B65G1/04—Storage devices mechanical
    • B65G1/137—Storage devices mechanical with arrangements or automatic control means for selecting which articles are to be removed
    • B65G1/1373—Storage devices mechanical with arrangements or automatic control means for selecting which articles are to be removed for fulfilling orders in warehouses
    • B65G1/1378—Storage devices mechanical with arrangements or automatic control means for selecting which articles are to be removed for fulfilling orders in warehouses the orders being assembled on fixed commissioning areas remote from the storage areas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
    • B65G2201/02—Articles
    • B65G2201/0267—Pallets

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  • Engineering & Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Mechanical Engineering (AREA)
  • Economics (AREA)
  • Operations Research (AREA)
  • Tourism & Hospitality (AREA)
  • Finance (AREA)
  • Entrepreneurship & Innovation (AREA)
  • Human Resources & Organizations (AREA)
  • Marketing (AREA)
  • Accounting & Taxation (AREA)
  • Quality & Reliability (AREA)
  • Strategic Management (AREA)
  • Development Economics (AREA)
  • Physics & Mathematics (AREA)
  • General Business, Economics & Management (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Warehouses Or Storage Devices (AREA)
  • Stacking Of Articles And Auxiliary Devices (AREA)
  • De-Stacking Of Articles (AREA)

Abstract

The invention relates to a method for supplying a palletizing device with goods to be palletized in an order-related manner in a warehouse or distribution center (1), wherein - pallets with goods are delivered, in particular in a properly sorted manner, at a goods entry point (2) of the warehouse; - the pallets are temporarily stored, in particular in a high-rise storage rack (4); - pallets with goods required for filling a buffer store are retrieved from the temporary storage; - the goods are depalletized from the pallets, in particular in layers, in a depalletizer (5); - the goods are then individualized; - the individualized goods are buffered in a buffer store (7), which is provided with a shop layout, so as to provide individual access; and - the buffer store is connected to the palletizing device in order to supply the palletizing device in an order-related manner, wherein the goods required for an order are retrieved in an individualized and controlled manner according to a specified sequence and transported to the palletizing device.

Description

Supply method for palletising devices in distribution centres
Technical Field
The present invention relates to a supply method for palletising devices in distribution centres.
Background Art
The - optionally automatic - stacking of a base or carrier, in particular a pallet or a trolley, with packed items to form a stack for subsequent dispatch, i.e. “palletising” is known per se. However, in this case packed items having a uniform size or dimension are placed manually or ίθ by robots, grabs etc. in locations determined by computer.
In contrast, the process of loading a load carrier with packed items with different characteristics to form a stack is the so-called “mixed-case” palletising.
ί5 Current distribution logistics place ever increasing demands upon the picking process.
Therefore, it is necessary to develop picking systems which process orders automatically without manual intervention.
To this end, automatic systems are being used ever more frequently for palletising purposes.
’0 Such systems are known e.g. from EP 1 462 394 Bl, WO 2010/059923 Al and WO 2008/068264 Al or even WO 2014/005895 Al.
Thousands of different products (or packed items) with the most varied characteristics (size, shape, weight, dimensions, surfaces, solidity etc.) must be picked automatically with such 25 systems.
Automated warehouses or goods distribution centres hold available a multiplicity of the most varied goods which, after an order has been placed, are compiled, i.e. picked, to produce a customised client delivery according to requirements.
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In the goods distribution centre, pallets holding one type of goods are generally delivered and temporarily stored. The pallets holding one type of goods generally comprise a plurality of packages which are palletised e.g. in layers. For the purpose of temporary storage, so-called high-rack storage areas are often used which are designed as multi-level structures. The high5 rack storage areas often use racking serving apparatuses in order in each case to remove a complete pallet from the high-rack storage area and to supply it to a singulating station. Other corresponding options for pallet storage are likewise feasible.
In this case, it is necessary to take account of different aspects which enormously increase the ίθ complexity compared with the “simple” manual stacking of simple regular geometries. For instance, a subsequent packed item can be stacked or placed effectively onto a preceding packed item only if the latter has a flat or planar surface which should also be oriented approximately horizontally, and if the packed item can support the weight of the further packed items placed on it without incurring damage.
ί5
Furthermore, the formed stack should have a certain stability, inter alia to ensure that it does not fall over when being transported. Film-wrapping does help but on its own cannot stabilise an incorrectly formed stack.
’0 Moreover, customers are ever more frequently requiring stacks to be optimised by reason of a desired unloading sequence. To this end, it has been found that a so-called shop-layout of the warehouse is advantageous. Particularly in the food sector, warehouses are organised in this manner because the product range therein is extremely high and the unloading sequence in the supermarket is specified. In the case of a shop-layout, the different products are arranged as in the shop, i.e. grouped according to product families and arranged in specific aisles corresponding to the sequence on the shop floor. In other words, the different goods are thus arranged in the warehouse grouped in the aisles in the same sequence as in the supermarket aisles. In the warehouse, different goods are arranged or stored organised into common groups of goods in spatial proximity, typically in the same or adjoining aisles.
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In addition, the problem in the case of a shop layout of the warehouse in the distribution centre is the change of flow and the distribution of the goods associated therewith. The goods are no longer distributed homogeneously across the warehouse or randomly but rather are organised in specific item groups in aisles, wherein the arrangement in the aisles is itself random.
The palletising algorithms and machines used for forming stacks permit already relatively stable stacks having a specified order to be formed and have very high outputs or throughputs.
However, they require a continuous flow of products from the corresponding aisles, for which ίθ reason they need replenishment or have to be filled.
It is also necessary to taken into account a distribution of an order onto a plurality of pallets, as is generally the case when supplying goods to supermarkets.
ί5 Typically, the palletising devices comprising goods are supplied to a warehouse as follows:
Initially, pallets holding one type of goods are delivered to the incoming goods area and temporarily stored. The pallets holding one type of goods generally comprise a plurality of packages which are palletised e.g. in layers. For the purpose of temporary storage, the pallets are ’0 transported to high-rack storage areas where racking serving apparatuses are used for placing the pallets into storage or removing them from storage.
If goods are required from the corresponding pallet, the pallet is removed from storage and is depalletised mostly layer-by-layer in a depalletiser and subsequently the goods are singulated.
Then, the goods are temporarily stored in a buffer storage area until a corresponding order is actually waiting to be processed or all of the goods are in stock. The buffer storage areas are typically automatic small parts warehouses or shuttle warehouses in which the goods can be removed from storage individually and in a controlled manner according to a specified sequence 30 (influenced e.g. by the loading sequence on the pallet).
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If an order has been placed, a stacking arrangement of the pallet or of the trolley is calculated on the basis of the ordered goods and the desired sequence of unloading, for which reason a palletising algorithm of the warehouse management system establishes in advance a sequence and arrangement of the individual goods in the stack.
Subsequently, the different articles/goods are retrieved from the buffer storage area and are supplied in the calculated sequence to a palletising machine or a manual palletising device.
ίθ The goods which are now no longer present in the buffer storage area are then replenished from the pallet warehouse.
To this end, the goods are classified according to turnover rate and optionally further criteria (e.g. volume) and the number of parts to be depalletised (whole pallet, half a pallet, one layer ί5 etc.) is determined. This method together with the other warehouse strategies (cf. above), in particular the shop layout, ensures that the goods structure fluctuates from aisle to aisle in the buffer storage area (many slow-rotating items vs. few fast-rotating items or small goods vs. large goods). Therefore, capacity is lost in the storage aisles of the buffer storage area and goods which are required cannot be accommodated.
’0
The turnover rate (fast-moving items vs. slow-moving items) of the goods can be established e.g. by means of ABC analysis.
To date, replenishment has been performed merely statistically based on history; it is thus imprecise and possibly incorrect. Anticipatory forecasting to enable the supply of sufficient quantities is possible e.g. only for about 3 to 4 hours. Therefore, bottlenecks can occur and so the palletising machines are not able to call on their full capacity. To date, this supply aspect has not been addressed satisfactorily.
It is to be understood that, if any prior art is referred to herein, such reference does not constitute
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2015317033 17 Apr 2020 an admission that the prior art forms a part of the common general knowledge in the art, in Australia or any other country.
Summary
Disclosed is a supply method for palletising machines in distribution centres, by means of which the supply to palletising machines can be improved, even if the distribution centre utilises a shop layout.
In accordance with a first aspect, disclosed is a method of supplying a palletising device with ίθ goods for order-related palletisation in a warehouse or distribution centre, the method comprising:
- delivering pallets holding the goods to an incoming goods area of the warehouse;
- transporting, by a racking serving mechanism, and temporarily storing the pallets in a temporary storage area;
- removing, by the racking serving mechanism, one or more pallets containing goods from storage in the temporary storage area for replenishing a buffer storage area;
- depalletising, by a depalletising apparatus, the goods from the one or more pallets layerby-layer and, upon the depalletising, singulating the goods;
- buffering, by a level racking serving apparatus, the singulated goods in the buffer storage ’0 area, wherein the buffer storage area is provided with a shop layout and has individual access, and wherein the buffer storage area is connected to a palletising device for the supplying the goods to the palletising device in accordance with an order,
- removing, by the level racking serving apparatus, the goods required for the order from the buffer storage area;
- transporting, via a first conveyor system, the goods required for the order to the palletising device individually and in a controlled manner according to a specified sequence for palletising; and
- supplying, via a second conveyor system, the buffer storage area with new goods from the pallets in the temporary storage area by (i) removing, by the racking serving mechanism, pallets with the new goods from the temporary storage area, and (ii) depalletising and
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2015317033 17 Apr 2020 singulating, by the depalletising apparatus, the new goods using a dynamic adaptation of a minimum depalletising quantity;
- wherein the dynamic adaptation is used to specify the minimum depalletising quantity of the new goods and a specific product to be at least depalletised, wherein the minimum depalletising quantity is statistically calculated in advance of the depallatising based on history of at least an order backlog, wherein the minimum depalletising quantity is dynamically adapted during the depalletising and is based on (1) a fill level of the specific product and (2) a filling extent of one or more aisles of the buffer storage area allocated to the depalletiser, wherein the minimum depalletising quantity is dynamically reduced or increased based on (1) the fill level of ίθ the specific product and (2) the filling extent of the one or more aisles of the buffer storage area allocated to the depalletiser, and wherein one or more densely filled aisles of the buffer storage area are supplied more frequently but with a smaller quantity of the new goods.
According to a second aspect, disclosed is a method of supplying goods for orders at a ί5 warehouse or distribution centre, the method comprising:
- receiving, via a racking serving mechanism, a plurality of pallets at a temporary storage area, each pallet of the plurality of pallets at least partially supporting a specific type or set of goods;
- dynamically selecting, via the racking serving mechanism, pallets of the plurality of ’0 pallets received in the temporary storage area for depalletisation based at least in part on the specific type or set of goods on the selected pallets;
- transferring, via a first conveyor system, the selected pallets from the temporary storage area to a depalletiser depalletising apparatus of a plurality of depalletisers depalletising apparatuses, wherein the depalletiser depalletising apparatus is allocated to a family of goods associated with the specific type or set of goods on the selected pallets;
- depalletising, by the depalletising apparatus, the specific type or set of goods from the selected pallets at the depalletiser;
- transferring, via a second conveyor system, the specific type or set of goods to a buffer storage area and storing the specific goods in a portion of the buffer storage area substantially in spatial proximity to other goods of the family of goods;
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- removing, by a level racking serving apparatus, and transporting, via a third conveyor system, one or more of the specific type or set of goods required for an order from the buffer storage area to a palletiser palletising device for palletising; palletising, by the palletising device, the one or more of the specific type or set of goods required for the order; at the palletiser; and
- providing, via a fourth conveyor system, the palletised goods to an outgoing goods area for shipment of the order; and
- upplying, via the second conveyor system, the buffer storage area with new goods from the pallets in the temporary storage area by (i) dynamically selecting pallets of the plurality of pallets for depalletisation based at least in part on the specific type or set of goods on the selected pallets, (ii) removing the selected pallets from the temporary storage area, and (iii) depalletising, using a dynamic adaptation of a minimum depalletising quantity, the specific type or set of goods on the selected pallets;
- wherein the minimum depalletising quantity is statistically calculated in advance of the depallatising based at least on history of an order backlog, wherein the minimum depalletising quantity is dynamically adapted during the depalletising and is based on (1) a fill level of the specific type or set of goods and (2) a filling extent of one or more aisles of the buffer storage area allocated to the depalletiser depalletising apparatus.
According to a third aspect, disclosed is a method of supplying a palletising device with goods for order-related palletisation in a warehouse or distribution centre, the method comprising:
- delivering pallets holding the goods to an incoming goods area of the warehouse;
- using a racking serving mechanism to transport the pallets into a temporary storage area and to selectively remove one or more pallets from the temporary storage area for replenishing a buffer storage area;
- using a depalletising apparatus to depalletise the goods layer-by-layer from the one or more pallets and to singulate the goods;
- using a level racking serving apparatus to buffer the singulated goods in the buffer storage area and to remove one or more goods from the buffer storage area in accordance with an order;
- transporting, via a conveyor system, the one or more goods required for the order to a
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2015317033 17 Apr 2020 palletising device according to a specified sequence for palletising; and
- supplying the buffer storage area with new goods from the pallets in the temporary storage area by (i) removing at least one pallet with the new goods from the temporary storage area, and (ii) depalletising and singulating the new goods using a dynamic adaptation of a minimum depalletising quantity;
- transporting, via a conveyor system, the one or more goods required for the order to a palletising device according to a specified sequence for palletising; and
- supplying the buffer storage area with new goods from the pallets in the temporary storage area by (i) removing at least one pallet with the new goods from the temporary storage ίθ area, and (ii) depalletising and singulating the new goods using a dynamic adaptation of a minimum depalletising quantity;
- wherein the dynamic adaption is used to specify the minimum depalletising quantity of the new goods and a specific product to be at least depalletised, wherein the minimum depalletising quantity is statistically calculated in advance of the depallatising based on history ί5 of at least an order backlog, wherein the minimum depalletising quantity is dynamically adapted during the depalletising and is based on (1) a fill level of the specific product and (2) a filling extent of one or more aisles of the buffer storage area allocated to the depalletising apparatus,
- wherein the minimum depalletising quantity is dynamically reduced or increased based on (1) the fill level of the specific product and (2) the filling extent of the one or more aisles of ’0 the buffer storage area allocated to the depalletising apparatus, and wherein one or more densely filled aisles of the buffer storage area are supplied more frequently but with a smaller quantity of the new goods.
It has been recognised that the buffer storage area is supplied with new goods from the pallets in 25 the temporary storage area by removal from storage, depalletising and singulation by means of a dynamic adaptation of the quantity to be removed from storage and depalletised, it is possible to hold available sufficient goods in the buffer storage area to process orders on the palletising machine without any delays.
In other words, only shortly before a depalletising procedure, which is planned statistically by
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2015317033 17 Apr 2020 means of historical data and typical turnover rate of goods, is a check carried out to establish whether the hitherto scheduled quantity of goods intended for depalletising is sufficient for the respective aisle or article group in the aisle. Therefore, there is a wait until the last possible point in time in order to establish or vary the precisely required depalletising quantity.
In the event of a low fill level, a decision can be made that the planned depalletising quantity is increased, or in the case of a high fill level a decision can be made that the planned depalletising quantity is reduced. It has thus been recognised that in this way it is possible to utilise the picking warehouse in a dynamically optimised manner.
In so doing, a distinction is made between the fill level and the filling extent. The filling extent relates to the free space in the buffer storage area, whereas the fill level relates to the quantity of specific articles in the buffer storage area.
ί5 Therefore, when replenishing the buffer storage area not only is the fill level of articles, which decreases on account of order processing, taken into consideration but also the filling extent of the buffer storage area. In the event of a high filling extent, fewer articles are depalletised and in the event of a lower filling extent, more articles are depalletised.
’0 In an expedient manner, an arbitrary depalletising quantity is not changed or determined but instead a minimum depalletising quantity, which is specified for the goods warehouse and the specific product, is adapted dynamically at the time of depalletising (i.e. not until just before the actual depalletising, cf. above). This minimum depalletising quantity is a depalletising quantity which is calculated in advance statistically on the basis of the history of the order backlog and the goods warehouse and is at least depalletised in order to provide a supply to the buffer storage area.
For instance, the depalletising quantity can be adapted dynamically on the basis of the fill level of the respective product and/or the filling extent of the aisle(s) of the buffer storage area allocated to the depalletiser. In this case, the turnover rate can also be taken into account. Other
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2015317033 17 Apr 2020 significant goods characteristics, such as volume, weight, density etc. can also be incorporated into the determination of the dynamic adaptation.
For instance, the depalletising quantity can then be reduced or increased dynamically on the basis of the fill level or the filling extent of the aisles of the buffer storage area allocated to the depalletiser with the respective product.
However, such an increase is not performed excessively but rather only within a specified framework, i.e. e.g. a maximum depalletising quantity, which is specified in particular for the ίθ goods warehouse and the specific product, is not exceeded so that space is always available for other goods in the buffer storage area.
In particular, it has been found that it is expedient if densely filled aisles of the buffer storage area - i.e. those with a high filling extent - are supplied more frequently but with a smaller ί5 quantity of goods in each supply procedure, and similarly less densely filled aisles of the buffer storage area are supplied less frequently but with a larger quantity of goods in each supply procedure.
The supply requirement can be verified cyclically, in dependence upon the fill level and/or the ’0 filling extent of the buffer storage area or in an event-controlled manner.
In one variant, the buffer storage area uses level racking serving apparatuses of the shuttle type which exchange goods between the aisles via dedicated cross-conveyance locations by placing said goods more deeply into storage, as described in DE 10 2012 107 176 Al by the applicant.
Therefore, materials handling equipment can be omitted to the greatest possible extent in the prezone.
In some embodiments, only a small number, i.e. two or three mutually adjoining aisles of the buffer storage area can be connected to a palletising machine. It may be two or three aisles of 30 the buffer storage area are connected to a depalletiser. This has been found to be an effective
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2015317033 17 Apr 2020 configuration for a shop layout.
By restricting the family of articles to a small number of aisles within the framework of the shop layout, the necessary transfers between the aisles are minimised. The transfers could be performed in the pre-zone by means of materials handling equipment, as is typically the case. The pre-zone can then be relieved. However, if the transfers are performed, as is preferably the case, by means of the dedicated cross-conveyance locations and the shuttle vehicles, this leads in turn to an improvement in the utilisation of the shuttle vehicles inter alia for placement into storage and removal from storage and the pre-zone can be completely omitted (cf. above).
ίθ
Of course, other shuttle types, such as multi-level racking serving apparatuses and warehouses comprising pre-zones for transfers can also be used for this purpose.
The palletising device can be a manual palletising device, such as a manual Dematic Ergopal ί5 Station, such as described inter alia in WO 2009/109218 Al. However, a palletising machine may be used, i.e. an automatic palletising device.
It is understood that even if the term ‘pallet’ or ‘palletising’ has been used, the stacking of other bases or supports, such as e.g. trolleys etc. is also possible and is to be encompassed by the ’0 invention.
Brief Description of the Drawings
Further features and details of the disclosure will be apparent from the following description of the drawing, in which
Figure 1 shows a schematic block diagram of the structure of a distribution centre;
Figure 2 shows a flow diagram of the supply to a palletising machine of figure 1.
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Detailed Description
Figure 1 schematically shows a block diagram of the structure of a distribution centre, which is designated in its entirety by the reference sign 1, for supplying the flow of goods to supermarkets.
The distribution centre 1 comprises an incoming goods area 2 where pallets holding one type of goods are delivered, and an outgoing goods area 3 where finished pallets and/or trolleys compiled according to customer requirements are loaded.
The delivered pallets are temporarily stored, for which reason they are transported to a high-rack storage area 4 where racking serving apparatuses are used for placing and removing the pallets into and out of storage.
ί5 The high-rack storage area 4 is connected to the depalletiser 5 via conveyors 6 so that when goods are required from a corresponding pallet, this pallet is removed from storage and depalletised usually layer-by-layer in a depalletiser 5 and then the goods are singulated.
The term ‘goods’ comprises inter alia individual articles, bundles and packaging units such as ’0 e.g. 6-packs, shrink-wrapped articles etc. and also goods picked according to customer requirements (e.g. for a chain store branch) in containers or cartons.
Then, the goods are temporarily stored in a buffer storage area 7 until a corresponding order is actually waiting to be processed or all goods are in stock. To this end, the depalletisers 5 are connected to the buffer storage area 7 via conveyors 8. In the present case, each depalletiser 5 is connected in each case to two aisles 9 of the buffer storage area 7.
The buffer storage area 7 is a shuttle warehouse in which the goods are stored according to a shop layout. The buffer storage area 7 utilises level racking serving apparatuses S of the shuttle 30 type which exchange goods between the aisles 9 via dedicated cross-conveyance locations 10 by
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2015317033 17 Apr 2020 placing said goods more deeply into storage on one racking side and removing them from storage in the normal manner on the other racking side of mutually adjoining racking units 11, as described in DE 10 2012 107 176A1 by the applicant. Therefore, the goods are exchanged between the aisles 9 of the buffer storage area 7 by means of the level racking serving apparatuses S and the cross-conveyance locations 10.
The buffer storage area 7 is connected to the palletising machine 13 via conveyors 12 for the purpose of processing orders or stacking pallets or trolleys, as known from DE 10 2012 106 109 Al. For this purpose, two aisles 9 of the buffer storage area 7 are connected in each case to a ίθ palletising machine 13.
The palletising machines 13 dispose of completed pallets and trolleys via conveyors 14 to the outgoing goods area 3.
ί5 In order to ensure the processing of orders for compiling the pallets, it is necessary to ensure the supply of goods to the buffer storage area 7 (e.g. from the high-rack storage areas 4) and thus to the palletising machines 13.
To this end, in accordance with the invention the following procedure is performed and is ’0 explained with reference to figure 2.
For each depalletiser 5, a depalletiser work list is configured (number of pallets / layers / packages to be depalletised) and accordingly for the control of supply a palletiser work list is configured (number of orders / order lines / cases to be processed, number of pallets / layers / 25 packages to be palletised, expected total palletising period).
From this palletiser work list it is possible to dynamically determine the current demand for each article. Furthermore, an optimum stock inventory is configured for each article. The optimum stock inventory can be calculated if statistics or prognoses of the sales quantities (demand in the 30 orders of the distribution centre) are available for the articles and a desired range is established
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2015317033 17 Apr 2020 for each article. Fast-moving items then have a higher optimum stock inventory and slowmoving items have a lower optimum stock inventory. Therefore, a specified minimum depalletising quantity is available.
Articles are grouped into article families in the shop layout in the buffer storage area (i.e. different goods are arranged or stored in a manner organised into common groups of goods in spatial proximity, typically in the same or adjoining aisles), wherein a list of the assigned depalletisers 5 is established for each article family. Each depalletiser 5 is allocated to one or a plurality of article families.
ίθ
For each individual depalletiser 5, a check is performed cyclically to establish whether a further supply order can or must be dispatched.
The sequence of the articles, the supply of which is to be checked, in the palletiser work list is defined by the priority of the orders.
The dispatch of supply orders can also be checked in an event-controlled manner (instead of cyclically), e.g. if the depalletiser work list decreases or the palletiser work list increases.
’0 In addition, in order to check whether an article needs to be supplied, a minimum stock inventory per article can be configured and checked.
A desired filling extent is configured for the buffer storage area 7. In determining the supply quantity, the current average filling extent of the storage-entry aisles permitted for the associated 25 article family is determined. If this filling extent is less than the desired value, the supply quantity is then increased. If the filling extent is higher, the supply quantity is reduced, wherein, however, the current demand must be fulfilled.
For instance, after the start (step I) an initial check is performed to establish whether the depalletiser work list is sufficient (step II).
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If this is affirmed, then the verification is restarted after a waiting period (cycle time, step IV).
If this is not affirmed, then a check is performed in the next step III to establish whether there are 5 articles in the palletiser work list for which supply is required.
If this is not affirmed, then the verification is restarted after a waiting period (cycle time, step IV).
ίθ If this is affirmed (step V), the required supply quantity is then determined. To this end, the quantity is calculated from the difference between the optimal stock inventory and the actual stock inventory, wherein, if the demand is greater than the optimum stock inventory, the quantity is calculated as the difference between the actual demand and the stock inventory.
ί5 When refilling the buffer storage area, not only is the fill level with articles, which decreases by reason of order processing, taken into consideration but also the filling extent of the buffer storage area. In the case of a high filling extent, fewer articles are depalletised and in the event of a low filling extent, more articles are depalletised.
’0 In an expedient manner, rounding-up takes place to maintain complete layers, half pallets or whole pallets which are to be supplied by the depalletiser 5.
In accordance with the invention, the quantity calculated in this manner is subjected to dynamic adaptation of the supply quantity.
The dynamic supply quantity is determined by multiplying the quantity previously calculated from statistical data by a scaling factor. This factor is 1 if the current filling extent of the article in the buffer storage area corresponds to the desired value. If the filling extent is lower than the desired value, then the factor is greater than 1. If the filling extent is higher, then the factor is 30 less than 1. If the current filling extent is about 100%, then the scaling factor should be about 0.
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For instance, in the case of a linear approach the scaling factor can be calculated as (100% current filling extent) / (100% - desired filling extent).
For a current filling extent of 60% and a desired value of 80%, the scaling factor is 2.0, i.e. the supply quantity is doubled. For a current filling extent of 90% and a desired value of 80%, the scaling factor is 0.5, i.e. the supply quantity is halved.
The dynamicised quantity calculated in this manner is rounded up once again to pallet units to be ίθ depalletised.
Then, it is possible (in step VI) to dispatch the supply order and reserve and transport the source pallet from the high-rack storage area to the depalletiser etc. for supply to the buffer storage area.
ί5 In the claims which follow and in the preceding description of the invention, except where the context requires otherwise due to express language or necessary implication, the word “comprise” or variations such as “comprises” or “comprising” is used in an inclusive sense, i.e. to specify the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the invention.

Claims (20)

  1. Claims
    1. A method of supplying a palletising device with goods for order-related palletisation in a warehouse or distribution centre, the method comprising:
    5 - delivering pallets holding the goods to an incoming goods area of the warehouse;
    - transporting, by a racking serving mechanism, and temporarily storing the pallets in a temporary storage area;
    - removing, by the racking serving mechanism, one or more pallets containing goods from storage in the temporary storage area for replenishing a buffer storage area;
    ίθ - depalletising, by a depalletising apparatus, the goods from the one or more pallets layerby-layer and, upon the depalletising, singulating the goods;
    - buffering, by a level racking serving apparatus, the singulated goods in the buffer storage area, wherein the buffer storage area is provided with a shop layout and has individual access, and wherein the buffer storage area is connected to a palletising device for the supplying the ί5 goods to the palletising device in accordance with an order,
    - removing, by the level racking serving apparatus, the goods required for the order from the buffer storage area;
    - transporting, via a first conveyor system, the goods required for the order to the palletising device individually and in a controlled manner according to a specified sequence for ’0 palletising; and
    - supplying, via a second conveyor system, the buffer storage area with new goods from the pallets in the temporary storage area by (i) removing, by the racking serving mechanism, pallets with the new goods from the temporary storage area, and (ii) depalletising and singulating, by the depalletising apparatus, the new goods using a dynamic adaptation of a
    25 minimum depalletising quantity;
    - wherein the dynamic adaptation is used to specify the minimum depalletising quantity of the new goods and a specific product to be at least depalletised, wherein the minimum depalletising quantity is statistically calculated in advance of the depallatising based on history of at least an order backlog, wherein the minimum depalletising quantity is dynamically adapted
    30 during the depalletising and is based on (1) a fill level of the specific product and (2) a filling
    12287058_1 (GHMatters) P105157.AU
    2015317033 17 Apr 2020 extent of one or more aisles of the buffer storage area allocated to the depalletiser, wherein the minimum depalletising quantity is dynamically reduced or increased based on (1) the fill level of the specific product and (2) the filling extent of the one or more aisles of the buffer storage area allocated to the depalletiser, and wherein one or more densely filled aisles of the buffer storage
    5 area are supplied more frequently but with a smaller quantity of the new goods.
  2. 2. The method of claim 1, wherein a maximum depalletising quantity is not exceeded.
  3. 3. The method as claimed in either claim 1 or claim 2, wherein less densely filled aisles of ίθ the buffer storage area are supplied less frequently but with a larger quantity of goods in each supply procedure.
  4. 4. The method as claimed in any one of the preceding claims, wherein the buffer storage area utilises level racking serving apparatuses of the shuttle type which exchange goods between ί5 the aisles via dedicated cross-conveyance locations by placing said goods more deeply into storage.
  5. 5. The method as claimed in any one of the preceding claims, wherein a limited number of aisles, in particular two aisles, of the buffer storage area are connected to a palletising machine.
    ’0
  6. 6. The method as claimed in any one of the preceding claims, wherein at least two aisles of the buffer storage area are connected to the palletising device.
  7. 7. The method as claimed in any one of the preceding claims, wherein the palletising device 25 is a palletising machine.
  8. 8. A method of supplying goods for orders at a warehouse or distribution centre, the method comprising:
    - receiving, via a racking serving mechanism, a plurality of pallets at a temporary storage
    30 area, each pallet of the plurality of pallets at least partially supporting a specific type or set of
    12287058_1 (GHMatters) P105157.AU
    2015317033 17 Apr 2020 goods;
    - dynamically selecting, via the racking serving mechanism, pallets of the plurality of pallets received in the temporary storage area for depalletisation based at least in part on the specific type or set of goods on the selected pallets;
    5 - transferring, via a first conveyor system, the selected pallets from the temporary storage area to a depalletiser depalletising apparatus of a plurality of depalletisers depalletising apparatuses, wherein the depalletiser depalletising apparatus is allocated to a family of goods associated with the specific type or set of goods on the selected pallets;
    - depalletising, by the depalletising apparatus, the specific type or set of goods from the ίθ selected pallets at the depalletiser;
    - transferring, via a second conveyor system, the specific type or set of goods to a buffer storage area and storing the specific goods in a portion of the buffer storage area substantially in spatial proximity to other goods of the family of goods;
    - removing, by a level racking serving apparatus, and transporting, via a third conveyor
    15 system, one or more of the specific type or set of goods required for an order from the buffer storage area to a palletiser palletising device for palletising; palletising, by the palletising device, the one or more of the specific type or set of goods required for the order; at the palletiser; and
    - providing, via a fourth conveyor system, the palletised goods to an outgoing goods area for shipment of the order; and ’0 - upplying, via the second conveyor system, the buffer storage area with new goods from the pallets in the temporary storage area by (i) dynamically selecting pallets of the plurality of pallets for depalletisation based at least in part on the specific type or set of goods on the selected pallets, (ii) removing the selected pallets from the temporary storage area, and (iii) depalletising, using a dynamic adaptation of a minimum depalletising quantity, the specific type or set of goods 25 on the selected pallets;
    - wherein the minimum depalletising quantity is statistically calculated in advance of the depallatising based at least on history of an order backlog, wherein the minimum depalletising quantity is dynamically adapted during the depalletising and is based on (1) a fill level of the specific type or set of goods and (2) a filling extent of one or more aisles of the buffer storage
    30 area allocated to the depalletiser depalletising apparatus.
    12287058_1 (GHMatters) P105157.AU
    2015317033 17 Apr 2020
  9. 9. The method of claim 8, wherein the palletiser palletising device is comprises an automatic palletising device.
    5
  10. 10. The method of either claim 8 or claim 9, wherein the temporary storage area comprises a high-rack storage area including one or more racking serving apparatuses mechanisms that place and remove the plurality of pallets into and out of the temporary storage area.
  11. 11. The method of claim 10, wherein the high-rack storage area is connected to the plurality of ίθ depalletisers depalletising apparatuses by one or more conveyors a plurality of first conveyor systems.
  12. 12. The method of any one of claims 8 to 11, wherein the buffer storage area comprises a plurality of aisles and one or more shuttles movable thereabout that are operable to exchange ί5 stored goods between aisles of the plurality of aisles.
  13. 13. The method of claim 12, wherein the buffer storage area is in communication with the palletising device palletiser by one or more conveyors a plurality of third conveyor systems.
    ’0
  14. 14. A method of supplying a palletising device with goods for order-related palletisation in a warehouse or distribution center, the method comprising:
    - delivering pallets holding the goods to an incoming goods area of the warehouse;
    - using a racking serving mechanism to transport the pallets into a temporary storage area and to selectively remove one or more pallets from the temporary storage area for replenishing a
    25 buffer storage area;
    - using a depalletising apparatus to depalletise the goods layer-by-layer from the one or more pallets and to singulate the goods;
    - using a level racking serving apparatus to buffer the singulated goods in the buffer storage area and to remove one or more goods from the buffer storage area in accordance with an
    30 order;
    12287058_1 (GHMatters) P105157.AU
    2015317033 17 Apr 2020
    - transporting, via a conveyor system, the one or more goods required for the order to a palletising device according to a specified sequence for palletising; and
    - supplying the buffer storage area with new goods from the pallets in the temporary storage area by (i) removing at least one pallet with the new goods from the temporary storage
    5 area, and (ii) depalletising and singulating the new goods using a dynamic adaptation of a minimum depalletising quantity;
    - transporting, via a conveyor system, the one or more goods required for the order to a palletising device according to a specified sequence for palletising; and
    - supplying the buffer storage area with new goods from the pallets in the temporary ίθ storage area by (i) removing at least one pallet with the new goods from the temporary storage area, and (ii) depalletising and singulating the new goods using a dynamic adaptation of a minimum depalletising quantity;
    - wherein the dynamic adaption is used to specify the minimum depalletising quantity of the new goods and a specific product to be at least depalletised, wherein the minimum ί5 depalletising quantity is statistically calculated in advance of the depallatising based on history of at least an order backlog, wherein the minimum depalletising quantity is dynamically adapted during the depalletising and is based on (1) a fill level of the specific product and (2) a filling extent of one or more aisles of the buffer storage area allocated to the depalletising apparatus,
    - wherein the minimum depalletising quantity is dynamically reduced or increased based ’0 on (1) the fill level of the specific product and (2) the filling extent of the one or more aisles of the buffer storage area allocated to the depalletising apparatus, and wherein one or more densely filled aisles of the buffer storage area are supplied more frequently but with a smaller quantity of the new goods.
    25
  15. 15. The method of Claim 14, wherein the depalletising apparatus comprises a plurality of depalletising apparatuses, and wherein each depalletising apparatus is allocated to one or more groups of goods.
  16. 16. The method of claim 15, wherein the singulated goods are grouped into common groups of 30 goods in the buffer storage area.
    12287058_1 (GHMatters) P105157.AU
    2015317033 17 Apr 2020
  17. 17. The method of any one of claims 14 to 16, wherein the temporary storage area is connected to the depalletising apparatus via a first set of conveyors.
    5
  18. 18. The method of any one of claims 14 to 17, wherein the depalletising apparatus is connected to the buffer storage area via a second set of conveyors.
  19. 19. The method of any one of claims 14 to 18, wherein the palletising device is configured to process the order and to dispose of the order to an outgoing goods area.
  20. 20. The method of claim 19, wherein the palletising device is connected to the outgoing goods area via a third set of conveyors.
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